var http_request = false;
function makeRequest(url, parameters) {
	url = url + ".jsp";
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
			}
		}
	}
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}
	document.getElementById('content').innerHTML = "<img src='../images/carregando.gif' />";

	http_request.onreadystatechange = getContents;
	http_request.open('GET', url + parameters, true);
	http_request.send(null);
}

function getContents() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			result = http_request.responseText;
			document.getElementById('content').innerHTML = result;
		} else {
			document.getElementById('content').innerHTML = "<p>Conteúdo temporariamente indisponível</p>";
		}
	}
}